GE Lighting 47452 Energy Smart Spiral CFL 42-Watt (150-watt replacement) 2700-Lumen Spiral Light Bulb with Medium Base, 1-Pack A smart way to save energy Application: Table lamps, closet lights and standard applications Base: medium screw (E26); Bulb type: T4; Watts: 42 Initial Lumens: 2700 Guaranteed to last 8 years based on 4 hours use per day at 120V.